Martin henri rumpf



N0. 6l5,049. Patented Nov. 29, I898. NI. H. RUMPF.

INTERNAL COMBUSTION ENGINE.

(Application filed Dec. 8, 1897.)

No Modei.) 2 Sheets-Sheet l.

Q KN a INVENTOR; W/T/VE$'5$- I? f%/ w ATTORNEYS m: NORRIS QETERS coPHaYo-Lnm, wAsHmGvoN. o, c

No. 615,049. 7 Patented Nov. 29, I898. M. H. BUMPF.

INTERNAL COMBUSTIDN ENGINE.

(Application fil ed Dec. 8.1897.) [No Model.) 2 Sheets-Sheet 2.

WiTNESSES: E INVENTOR BY ll" a!" {7- ATTORNEYS NITED STATES MARTIN HENRIRUMPF,

OF BRUSSELS, BELGIUM.

INTERNAL-COMBUSTION ENGINE.

SPECIFICATION forming part of Letters Patent No. 615,049, dated November29, 1898.

Application filed December 8, 1897. Serial No. 661,143. (No model.)

To all whom it ntay concern.-

Be it known that I, MARTIN HENRI RUMPF, a citizen of Brazil, residing inBrussels, in the Kingdom of Belgium, have invented certain new anduseful Improvements in or Relating to Internal-Combustion Engines, ofwhich the following is a specification.

My invention relates to gas-engines; and it involves certainimprovements in engines of this nature that will be hereinafter made toappear in the following description of an engine provided with suchimprovements and illustrated in the accompanying drawings.

In said drawings, Figure 1 is a vertical longitudinal sectional view ofthe main cylinder, piston, and explosion-chamber of the engine,illustrating the position and arrangement of certain valves. Fig. 2 is ahorizontal longitudinal sectional view of said cylinder, piston, andeXplosion-chamber,the pump and its reservoir, and means auxiliary to thepump and intermediate the same and the cylinder for conveying thecombustible gases from their supply to the explosion-chamber, said viewbeing taken on the line 00 5c of Fig. 1. Fig. 3 illustrates a certainautomatic means for controlling the emission of air from the reservoir,said view being taken on the line w x of Fig. 1. Figs. 3 and 3' show indetail the means illustrated in Fig. 2 for conveying the combustiblegases from their supply to the explosion-chamber. Fig. 4 illustratesautomatic means under control of the enginegovernor for regulating thesupply of combustible gases that are conducted to the explosion-chamber;and Fig. 5 shows in detail a portion of the mechanism represented inFig. 3.

A is the main cylinder of the engine. Said cylinder communicatesdirectly with the explosion-chamber C, situated at its rear end, andisopen at its front end. The explosion chamber is provided with anair-inlet valve cl, that is spring-actuated and adapted to open when theexternal pressure is greater than the internal pressure on said chamber,and with an inlet for the combustible gases,which latter inlet isprovided with an atomizer f and communicates with a tube 19, connectingsaid inlet indirectly with the gas-supply through a device, hereinafterto be described, for propelling the gases into the explosion-chamber.

Said cylinder is also provided with a series of perforations c,constituting exhaust-ports. B is the piston for said cylinder, and B isits piston-rod, said piston-rod being pivotally connected to the piston.The piston-head is provided with a disk-valve a, and said diskvalve isadapted to be opened at each backward thrust of the piston by anextension I), projecting longitudinally from the contiguous end of thepiston-rod in a plane appreciably distant from that of the longitudinalaxis of said rod.

P is a pump provided with suitable suction and discharge valves, and Ris an air-reservoir in which air is compressed by said pump,communication between the two being afforded through the discharge-valvep of the pump. The piston of said pump is driven by means of apiston-rod E and a connecting-rod D, pivotally connected at theiradjoining ends by a pin it, arranged to slide in a guide mounted on theengine-frame, said rod D being connected to an eccentric keyed on thedrive-shaft of the engine.

S is a casing or housing mounted at one end upon the reservoir R andextending from the same over the explosion-chamber O. Said casingorhousing includes a chamber h, situated over said reservoir, and acylinder i, merging into said chamber and constituting the overhangingportion of said casing or housing. Through its upper wall said cylindercommunicates with a gas-supply through chamber h communication with theair-reservoir R is afiorded through the valve-controlled opening g. Thevalve 9 for this opening is spring-actuated and is automaticallyoperated, as hereinafter described. The pipe 10 connects said cylinder1' with the explosionchamber through two openings 0 and q, situated inthe lower wall of said cylinder. Z is a slide-valve contained in saidcylinder 2' and normally held away from the head of the cylinder by aspring 8, disposed between the head of said cylinder and the adjoiningend of said slide-valve. Said slide-valve is penetrated by a transverseduct n, which alternately registers with and conveys gas from the one tothe other of the openings m and 0, which are arranged out of oppositionto each other.

The slidevalve is actuated by compressed the tube m, and through thelower wall of the ICO air admitted through the valve-controlled openingg into the chamber 7L. By reducing the end of said slide-valve that iscontiguous to the chamber 7L and attaching thereto a disk t", thatclosely fits in the cylinder, an annular chamber q is formed. Thischamber communicates with the pipe 1), above described as providingcommunication between the cylinder at opening q and theexplosion-chamber, and when the compressed air which is admitted to thehousing 7t has driven the slide-valve with the charge which it carriesin its duct 91 to its extreme position, where said charge can escapeinto the pipe 1) through the opening 0, and said slide-valve againreturns, any air contained under compression in the tube 1) may beallowed to escape through said annular chamber and an opening 2- in thewall of the cylinder.

The valve 9 is operated from the pistonrod of the pump through anintermediate mechanism similarin function, construction, and operationto that shown and described in United States Patent No. 584,097, issuedto me June 8, 1897, to which patent reference may be had for adescription of said mech anism.

In Figs. 2, 3, and 3" I have illustrated a device, already described, bywhich the supply of gas admitted through the cylinder t to the tube 1)is regulated, and in Fig. 4 I have shown means whereby said device maybe controlled from the engine-governor. The means referred to consistsof a rod that penetrates the head of the cylinder t' and also theslide-valve Z. This rod has bearings in the cylinder-head and the disk2" and is pro-' vided with a transversely-arranged duct 11', thatregisters with the duct a of the slidevalve. The outer end of said rodcarries a crank d, and to this crank is connected (in such manner as topermit perfectly free reciprocation of the crank with the slide-valve)one end of a connecting-rod ,2, supported be tween its ends in a bracket3 mounted on the engine-frame, and having its other end connected to thelower arm of a bell-crank lever w, fulcrumed at ,2 on the engine-frame.The other arm of said bell-crank lever is operat-ively connected to acentrifugal governor z. Connected at one end to an eccentric on thedrive-shaft of the engine is ahorizontally-reciprocatory shaft F,situated in a plane that is slightly above the normal position of theextremity of the upper arm of the bell-crank lever. Extending from thefree end of said shaft F and pivotally connected thereto by means of apin a, that slides in a suitable guide mounted on the engine-frame, isan arm G, having a notch t in its free end and supported in a horizontalposition by means of a projection v, extending from the shaft F. Thenotch 15 is adapted to receive a pin 3 carried on the end of the upperarm of the bell-crank lever whenever the said lever, under the influenceof the governor, is moved out of its normal position. It will be obviousfrom the foregoingthat whenever the speed of the engine increases beyonda predetermined degree the bell-crank lever is drawn by the governorinto such a position as to be engaged by the arm G in its reciprocationswith the shaft F and suddenly thrown upward, thereby momentarilyeffecting the closure or partial closure of the passage through the ductn, and consequently interfering with the supply of gas until the speedof the engine has sufiiciently decreased to allow the governor to movethe bell-crank lever to its normal position.

The operation of the engine may be thus described: In starting theengine the pump is first thrown out of gear and is disconnected from itsoperating means. The pump is then worked by hand in order to fill thereservoir. Having filled the reservoir, the disconnected parts are againplaced in operative arrangement and the fiy-wheel of the engine given aturn by hand in the direction indicated by the arrow in Fig. 1. Thepiston-rod of the pump is consequently reciprocated and'effects theopening of the valve 9, thereby permitting compressed air to flow intothe chamber h back of the slide-valve. The compressed air moves saidslide-valve and the latter carries its charge of gas in the duct n tothe opening 0, where, upon its escape into the tube 1), it is drivenonward into the explosion-chamber by the air which, having driven thepiston far enough, escapes into tube 1) through the opening q. Theexplosion being effected, the piston of the engine is driven forward inthe cylinder A, and when the piston has passed to a certain point, thepressure within the cylinder being less than the external pressure ofthe atmosphere, air enters at the valve d in the explosion-chamber andfills the same and the cylinder, driving out the consumed gases throughthe exhaust-ports 0 when the piston has passed them. The return of thepiston to compress the air contained in the cylinder then follows. Allof the air contained in said cylinder, however, is not compressed, butjust enough is permitted to escape through the valve a of the piston,which is caused to open in an obvious manner by means of the extensionZ), to leave the proper quantity in the explosionchamber for forming themixture with the next charge of gas.

The operation of that portion of the mechanism of the engine whichcontrols the amount of the charge that escapes through the duct 17. fromthe supply-pipe m has been hereinbefore referred to, and furtherdescription thereof is believed to be therefore unnecessary.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In a gas-engine, the combination with the main cylinder and itsexplosion-chamber, an airreservoir communicating with said chamber, anda gas-supply, of a slide-valve situated between saidair-reservoir andthe explosion-chamber, actuated by the air in the former, and adapted toconvey charges of gas from the gas-supply to the latter and to controlthe communication between said air-reservoir and the explosion-chamber,substantially as described.

2. In a gas-engine, the combination with the main cylinder and itsexplosion-chamber, an air-reservoir, and a gas-supply, of a housingaffording communication between said reservoir and the chamber andcommunicating with the gas-supply, and a slide-valve situated in saidhousing, actuated by the air in said reservoir and adapted to convey gasfrom the gas-supply to the explosion-chamber and to control thecommunication between the said reservoir and the chamber, substantiallyas described.

3. In a gas-engine, the combination with the main cylinder and itsexplosion-chamber, an air-reservoir and a gas-supply, of a housingcommunicating ,with the said gas-supply and with the reservoir, a forkedtube connecting said housing with the explosion-chamber, communicationbetween said chamber and the reservoir being afforded through one of themembers of said tube and the housing, and a slide-valve in said housingactuated by the air in the reservoir and adapted to convey gas from saidgas-supply to one member of said tube and to control the communicationbetween said explosion-chamber and the resand adapted to convey gas fromsaid gas-supply to one member of said tube and to control thecommunication between said explosionchamber and the reservoir throughthe other member of said tube, and a spring-pressed valve actuated fromthe pump-piston and controlling the communication between said housingand the reservoir, substantially as described.

5. In a gas-engine, the combination with the main cylinder and itsexplosion-chamber, of a gassupply communicating with said chamber, aslide-valve for controlling the communication between said gas-supplyand the chamber, a rod projecting through said slidevalve and providedwith a transverse duct adapted to register with the duct in theslidevalve, a governor connected to and adapted to rotate said rod, andmeans operated from the main shaft of the engine and independent of saidgovernor for manipulating said rod when the speed of the engine isabnormal, substantially as described.

6. In a gas-engine, the combination with the main cylinder and itsexplosion-chamber, of a gas-supply communicating with said chamber, aslide-valve for controlling the communication between said gas-supplyand the chamber, a rod projecting through said slidevalve and providedwith a transverse duct adapted to register with the duct in theslidevalve, a lever connected to said rod and the engine-governor andadapted to rotate the former, and a reciprocating element operated bythe main shaft of the engine and adapted to engage said lever so as tomanipulate the rod when the speed of the engine becomes abnormal,substantially as described.

In testimony whereof I have hereto set my hand in the presence of thetwo undersigned witnesses.

MARTIN HENRI RUMPF.

IVitnesses ALFRED WUNDERLIOH, GREGORY PHELAN.

